JPH02305745A - Sheet positioning device - Google Patents

Abstract

PURPOSE:To perform side registration at a high precision smoothly in a short transfer way by forming a transfer mechanism of at least one transfer belt inclined for a predetermined inclination angle in the direction of a side plate, and disposing a rotary body freely rotatably at a paper transferring position and over the transfer belt through the paper next to a separation mechanism. CONSTITUTION:An overlap roller (rotary body) 9 for transfer of papers is provided freely rotatably over a transfer belt 6. The installation position of this overlap roller 9 is a position where feed force by a separation belt 2 is eliminated or decreased. A separated paper 1 is thus moved from the separation belt 2 to a side registration part 10 smoothly in a short distance. The paper 1 then passes the overlap roller 9, and the paper 1 gets inclined along an inclination angle theta of the transfer belt 6 to be guided into a groove 20 at the side registration part 10.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sheet positioning device for a printer, and particularly to a sheet positioning device suitable for realizing with a highly accurate, compact, and low-cost device. .

[Prior art] In the conventional sheet positioning device, Japanese Patent Application Laid-Open No. 58-1
As described in Japanese Patent No. 00047, in most devices, the positioning of a sheet of paper (hereinafter referred to as paper) is performed only by positioning the paper, a toner image, and the leading edge.

In addition, as described in JP-A No. 57-90343, when performing side registration of the paper, the paper is first placed in the side registration so that the corners of the paper do not come into contact with the side registration guide (reference guide member). It was designed to be separated from the ration guide and then brought into contact.

There is also a method in which the corner or side portion of the paper is brought into direct contact with the side registration guide without separating the paper from the side registration guide.

[Problem to be solved by the invention]

Conventional sheet positioning devices do not take into consideration the fact that side registration of the paper (shifting the paper in a direction perpendicular to the transport direction) is performed reliably with a short transport path length, and the accuracy of side registration is poor. is low,
Further, there have been problems such as convex out-of-plane deformation of the paper due to changes in the conveyance direction in a short section and edge folding due to contact between the corners of the paper and the side registration guides.

An object of the present invention is to provide a sheet positioning device that can achieve highly accurate side registration with a short conveyance path.

[Means to solve the problem]

In order to achieve the above object, the sheet positioning device according to the present invention includes a separation mechanism that separates and feeds the branch paper accumulated in the hopper from the hopper, and a conveyance mechanism that transports the branch paper fed by the separation mechanism. and.

In a sheet positioning device for correcting the conveyance direction of branch paper, which is provided in a branch paper conveyance means consisting of a side plate that rotatably supports each axis of the conveyance mechanism and is disposed in the conveyance direction, an m-feeding mechanism is provided. It is formed by at least one conveyor belt inclined at a predetermined oblique angle in the direction of the side plate, and a rotating body is rotatably placed above the conveyor belt through the branch paper at a position where the branch paper is conveyed subsequent to the separation mechanism. configured to be placed.

Then, a reference guide member is provided on the side plate to restrict the branch paper traveling diagonally by the conveyor belt, and the reference guide member is arranged at a position where the front corner of the branch paper does not come into contact with it, and the side edges of the branch paper contact with each other. shall be.

Further, the rotating body may be an overlapping roller or a ball.

In addition, there is a separation mechanism that separates and feeds the branch paper accumulated in the hopper from the hopper, a transport mechanism that transports the branch paper fed by the separation mechanism, and a transport mechanism that rotatably supports each shaft of the transport mechanism. In a sheet positioning device for correcting the conveying direction of the branch paper, which is provided in a branch paper conveying means comprising a side plate disposed in the direction of the branch paper, at least one sheet positioning device is provided in which the conveyance mechanism is tilted at a predetermined oblique angle in the direction of the side plate. It may be formed by a diagonal roller, and a rotating body may be rotatably disposed through the branch paper at a position where the branch paper is conveyed subsequent to the separation mechanism and above the conveyance belt.

The position of the reference guide member is spaced by a shift distance from the side of the branch paper stacked in the hopper toward the side plate, and the oblique angle and the position of the reference guide member in the conveying direction are set relative to the shift distance. Each of these configurations has a predetermined accuracy.

Furthermore, the configuration may include a detection mechanism that detects that the front end of the branch paper has passed the front end of the reference guide member.

[Effect]

According to the present invention, the reference guide member (
By providing the side registration guide at a shift distance from the conveyor belt, the paper is conveyed diagonally so that the front corner of the paper does not come into contact with the side registration guide.

As a result, the paper is conveyed so that the side edges of the paper come into contact with the side registration guides.

〔Example〕

An embodiment of the present invention will be described with reference to FIG.

As shown in FIG. 1, the branch paper (
A separation mechanism consisting of a vacuum chamber 4 and a separation belt 2 that separates and feeds paper) 1 from a hopper 5, a transport mechanism that transports branch paper 1 fed by the separation mechanism, and each shaft of the transport mechanism. and a side plate 11 disposed in the conveying direction and rotatably supporting the branch paper conveying means,
In a sheet positioning device for correcting the conveyance direction of branch paper 1, the conveyance mechanism is formed by at least one conveyor belt 6 tilted at a predetermined oblique angle θ in the direction of the side plate 11, and the branch paper is In this configuration, a rotating body, for example, an overlap roller 9, is rotatably disposed above the conveying belt 6 at a position where the paper 1 is conveyed, with the branch paper 1 interposed therebetween.

Then, a reference guide member (side registration guide) 10 that regulates the branch paper 1 traveling obliquely by the conveyor belt 6
may be provided on the side plate 11, and the reference guide member 10 may be arranged at a position where the corner C of the front end of the branch paper 1 does not come into contact with it, but the side of the branch paper 1 contacts.

Further, the rotating body may be configured to be an overlap roller 9 or a ball (not shown).6 The sheets 1 deposited on the hopper 5 can be moved up and down by an elevator mechanism (not shown).

The side of this hopper 5 is fixed to a side plate 11 of the device.

The sheets 1 in the hopper 5 are separated by an air flow blown from a compressed air chamber 3 arranged in front of the hopper 5 . The uppermost sheet 1 of the separated sheets 1 is suctioned and adsorbed by a separation belt 2 having a vacuum chamber 4 . This separation belt 2 is stretched between the drive shaft 13 and the driven shaft 12, and is stretched between the N drive shaft 13 and the driven shaft 12.
The respective ends of the driven shaft 12 are rotatably supported by the side plate. A driving pulley 8 and a driven pulley 7 are provided at a predetermined distance apart, and the respective ends of the driving pulley shaft 16 and the driven pulley shaft 14 are connected to the side plate 11.
is rotatably supported. The drive pulley 8 is rotated by a drive source (not shown).

A part of the separation belt 2 has an opening, and the paper 1 is sucked through this opening. Then, the paper 1 is fed by rotating the belt 2 by one rotation. In this state,
The side of the paper 1 and the side plate 11 are parallel to each other.

A conveyor belt 6 is stretched between a driven pulley 7 and a drive pulley 8 in front of the separation mechanism. In addition.

This conveyor belt 6 is stretched obliquely in the direction in which a side registration guide 10 for performing side registration storage of the paper 1 is installed on a side plate 11.

A groove 20 is provided on the surface of the side registration guide 10 through which the paper passes, and the sides of the paper 1 pass through the groove 20 of the side registration guide 10.

An overlap roller 9 for conveying paper is rotatably provided above the conveyor belt 6. This overlap roller 9 is installed at a position where the feeding force by the separation belt 2 is eliminated or reduced. Therefore, the separated paper 1 moves smoothly and over a short distance from the separating mechanism to the side registration section.

When the paper 1 passes through the overlap rollers 9, the paper 1 is skewed along the skew angle O of the conveyor belt 6 and guided into the groove 20 of the side registration guide 10.

Next, the positional relationship of each part will be explained with reference to FIG.

From the front end of the paper 1 in the hopper 5, the overlap roller 9
The distance from the overlap roller 9 to the side registration guide 1o is L2, and the length of the side registration guide 10 is L3. The oblique angle of the conveyor belt 6 in the side plate direction B is θ1, and the circumferential length of the opening of the separation belt 2 is Ω. The shift distance from the paper guide surface 21 of the groove 20 of the side registration guide 10 to the side of the paper 1 in the hopper 5 on the side registration guide 10 side is defined as W.

After the paper 1 reaches the overlap roller 9, the oblique conveyor belt 6 and the overlap roller 9 move the paper 1 to the overlap roller 9.
The paper 1 is shifted toward the side registration guide 10 by a shift distance W and is conveyed. The condition at this time is that the paper 1 must be fed by the separation belt 2 until it reaches the overlap roller 9. In other words, L1 valve Q...(1). Next, in order to prevent the corner of the paper 1 from coming into contact with the side registration guide 10, the groove 20 between the paper 1 in the hopper 5 and the side registration guide 10 is
The positional relationship with the paper guide surface 21, that is, the shift distance W of the paper 1 is W≧(L, +L,)・tanθ
- It is necessary to do ---- (2).

Furthermore, to ensure side registration,
In order for the paper 1 to contact the side registration guide 1o, W≦(L2+L,+Lp)・tan(1・=・=(3
) (where Lp is the length of paper 1 in the transport direction).

Here, from equations (2) and (3), (Lz+L,)・tanθ≦W≦(Lz + L3 +
Lp)・tan O...(4)

Note that even if the separation part uses a friction separation method (4)
The formula holds true.

Next, the behavior of paper will be explained with reference to FIGS. 3 to 5.

FIG. 3 shows a state in which the paper 1 attracted to the separation belt 2 is separated and fed to the overlap roller 9.

Since the paper 1 is attracted to the separation belt 2 by vacuum pressure, it moves straight in the feeding direction A until it reaches the overlap roller 9 .

When the paper 1 reaches the overlap roller 9, the paper adsorption force of the separation belt 2 is reduced, and from this point on, the transport force by the overlap roller 9 and the transport belt 6 becomes dominant.

FIG. 4 shows a state in which the paper 1 is being conveyed in the side plate direction B while being skewed. However, the corner C at the front edge of the paper is
Paper guide surface 21 of side registration guide 1o
It never comes into contact with.

FIG. 5 shows a state in which the leading edge of the paper passes through the side registration guide 10. Corner C at the front edge of the paper is
Paper guide surface 21 of side registration guide 1o
It never comes into contact with. When the front edge of the paper passes the side registration guide 10, the side edge of the paper comes into contact with the paper guide surface 21 of the side registration guide 10, side registration of the paper 1 is performed, and the paper 1
is shifted toward the side plate 11 by a shift distance W, and then held and transported by a pair of transport means (not shown).

Another embodiment of the present invention will be described with reference to FIG.

A separation mechanism that separates and feeds the branch paper (paper) 1 accumulated in the hopper 5 from the hopper 5, a transport mechanism that transports the branch paper 1 fed by the separation mechanism, and rotation of each axis of the transport mechanism. Side plate 1 that is freely supported and arranged in the conveyance direction
1, in which the sheet positioning device corrects the conveyance direction of the branch paper 1, the sheet positioning device includes at least one skew movement in which the transport mechanism is tilted at a predetermined skew angle θ in the direction of the side plate 11; It may be formed by a roller 22, and a rotating body may be rotatably disposed with the branch paper 1 interposed therebetween at a position where the branch paper 1 is conveyed subsequent to the separation mechanism and above the conveyance belt 6.

As shown in FIG. 2 as another embodiment of the present invention, the reference guide member 10 is positioned at a shift distance W from the side of the branch paper 1 stacked in the hopper 5 toward the side plate 11. , the oblique angle O and the position of the reference guide member 1o in the transport direction each have a predetermined accuracy with respect to the shift distance law.

As another embodiment of the present invention, as shown in FIG. 6, a configuration including a detection mechanism (sensor) 23 for detecting that the front end of the branch paper 1 has passed the front end of the reference guide member 10 may be used.

〔Effect of the invention〕

According to the present invention, by arranging the reference guide member of the sheet positioning device at a predetermined position, highly accurate side registration can be performed on a short conveyance path without folding the edge of the paper or causing any obstructions. It has the effect of being able to print on paper and print on the entire surface of branch paper using a compact and low-cost device.

[Brief explanation of drawings]

Fig. 1 is a schematic configuration diagram of an embodiment of the present invention, Fig. 2 is a configuration diagram showing the arrangement conditions of each part, Figs. 3 to 5 are perspective views showing the flow of paper, and Fig. 6 FIG. 2 is a schematic configuration diagram showing another embodiment of the present invention. 1...Paper (leaf paper), 2...Separation belt (separation mechanism). 6... Conveyance belt (conveyance mechanism), 9... Overlap roller (rotating body), 10... Side registration guide (reference guide member), 11... Side plate.

Claims (1)

[Scope of Claims] 1. A separating mechanism that separates and feeds the branch paper accumulated in the hopper from the hopper, a transport mechanism that transports the branch paper fed by the separation mechanism, and each of the transport mechanism. In a sheet positioning device that corrects the conveyance direction of the branch paper, the sheet positioning device is provided in a branch paper conveying means comprising a side plate that rotatably supports a shaft of the branch paper and is disposed in the conveyance direction, and the sheet positioning device corrects the conveyance direction of the branch paper. A rotating body is formed by at least one conveyor belt inclined at a predetermined oblique angle in a direction, and rotates a rotating body through the branch paper at a position where the branch paper is conveyed subsequent to the separation mechanism and above the conveyor belt. A seat positioning device characterized by being freely arranged. 2. A reference guide member is provided on the side plate for regulating the branch paper that is slanted by the conveyor belt, and the reference guide member is placed at a position where the front corner of the branch paper does not come into contact with it and the side edges of the branch paper contact. The seat positioning device according to claim 1, further comprising a seat positioning device. 3. The sheet positioning device according to claim 1 or 2, wherein the rotating body is an overlap roller. 4. The seat positioning device according to claim 1 or 2, wherein the rotating body is a sphere. 5. A separation mechanism that separates and feeds the branch paper accumulated in the hopper from the hopper, a transport mechanism that transports the branch paper fed by the separation mechanism, and a shaft of each of the transport mechanism that is rotatable. In a sheet positioning device for correcting the conveying direction of the branch paper, the sheet positioning device is provided in a branch paper conveyance means comprising a side plate supported and disposed in the conveyance direction, and the sheet positioning device corrects the conveyance direction of the branch paper. A rotating body is formed by at least one oblique roller tilted at an angle, and is rotatably disposed at a position where the branch paper is conveyed subsequent to the separating mechanism and above the conveyor belt with the branch paper interposed therebetween. A seat positioning device characterized by: 6. The position of the reference guide member is spaced a shift distance from the side of the branch paper stacked in the hopper toward the side plate, and the oblique angle and the position of the reference guide member in the conveyance direction are determined with respect to the shift distance. The sheet positioning device according to any one of claims 1 to 5, wherein each of the positions has a predetermined accuracy. 7. The sheet positioning device according to any one of claims 1 to 6, further comprising a detection mechanism for detecting that the front end of the branch paper has passed the front end of the reference guide member.